Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ce8d4e7ce269af…

MALICIOUS

PDF

44.5 KB Created: 2020-06-12 17:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14fcc06d752960a1e981569f3871b651 SHA-1: ee134bf415c39c8780c3b46a882c77c23d5e06ab SHA-256: 19ce8d4e7ce269af5010761df62c42426ac75e6a1f38d1a575d2acbd3fe4fbe0
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body suggests it is a 'powerpoint presentation' lure, aiming to trick users into visiting these external URLs. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to a link farm, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://hopcanada.ca/uploads/1/3/0/6/130604141/130604141.html#exemple+de+pr%25C3%25A9sentation+powerpoint+d
    • http://sjhameed.com/uploads/1/3/1/3/131384301/eb49a174.pdf
    • http://theoregonexpress.com/uploads/1/3/0/8/130813518/jatozusatenagaxu.pdf
    • http://livingwaterirrigationandlighting.com/uploads/1/3/1/4/131453330/1282.pdf
    • http://mta-sts.mx.berksdogtraining.org/uploads/1/3/1/4/131483447/5bd637f1bd95.pdf
    • http://mywellington.org/uploads/1/3/0/8/130873946/duvezemi_gibepufotas_xewonanoratal.pdf
    • http://maiintaisimaiintai.com/uploads/1/3/1/4/131438622/sesifujeto.pdf
    • http://swisskonig.net/uploads/1/3/0/7/130738945/vasofesuzekex.pdf
    • https://powugukus.files.wordpress.com/2020/06/zutawakajegovaxodozolip.pdf
    • https://novetodida.files.wordpress.com/2020/06/82875114322.pdf
    • https://denilag.files.wordpress.com/2020/06/43937834084.pdf
    • https://gibagiteje.files.wordpress.com/2020/06/66900736412.pdf
    • https://zagezaf.files.wordpress.com/2020/06/62165989309.pdf
    • https://torasepab.files.wordpress.com/2020/06/75951809592.pdf
    • https://kenubid.files.wordpress.com/2020/06/4494123300.pdf
    • https://vajowobago.files.wordpress.com/2020/06/8876746854.pdf
    • https://goxapexuti.files.wordpress.com/2020/06/56876350407.pdf
    • https://penigan.files.wordpress.com/2020/06/nagupula.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e71.bin
f26bb6aa84a6cd0222dfd8377a6bc3e0379410b98d4244b9654e24f444ad55ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E71 11708 bytes

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